Copying machine control system

ABSTRACT

A multimode copying machine including a document conveying device, a manual paper feeding device and a manual feed mode switching device. The copying machine further includes a switch disposed adjacent to the manual paper feeding device for outputting a document change request signal, and a controller operable in response to the signal output in a manual feed mode to actuate the document conveying device for document changing.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a control system for a copying machineincluding a manual feed device to permit copying papers to be manuallyfed into the machine, and more particularly to a control system adaptedto control the manual feed device and an original document conveyingdevice in a collective and coordinated manner when the copying machineoperates in a mode associated with the original document conveyingdevice.

2. Description of the Prior Art

Generally, when taking copies with an electrophotographic copyingmachine in a manual copying paper feed mode, copying papers must beinserted one by one through an inlet of the manual feeding device foreach copying action in addition to replacement of an original documenton a document supporting glass plate with another. Thus the operation inthe manual copying paper feed mode is complicated and troublesomecompared with the case of an automatic copying paper feed mode which iscarried out simply by changing the original documents and pressing aprint key. Furthermore, with most copying machines document changingpositions and manual copying paper feeding positions are different,which in practice impairs the efficiency of the manual feed mode copyingand impresses the operational complication upon the user.

On the other hand, many proposals have been made concerning an originaldocument conveying device for automatically replacing a document on thedocument supporting glass plate with another. Examples of such proposalsare found in U.S. Pat. Nos. 4,264,188 and 4,365,889. However, none ofthem provide controls effective to eliminate the complexity of themanual feed mode copying operation.

SUMMARY OF THE INVENTION

An object of the present invention, therefore, is to provide a controlsystem for a copying machine which facilitates the setting of originaldocuments to an exposure position during a copying operation in themanual copying paper feed mode.

In order to achieve the above and other objects, the present inventionhas an automatic document conveying device and a manual feed devicecontrollably interrelated to each other.

According to one aspect of the invention, a control system for a copyingmachine comprises a manual feed mode changeover means for switching to amanual paper feed mode which is one of a plurality of paper feed modes,manual paper feed means for permitting copying papers to be manually fedin the manual paper feed mode, document conveyor means for transportingan original document to an exposure position and discharging theoriginal document from the exposure position, switch means disposedadjacent to the manual paper feed means and adapted to output a documentchange request signal, and control means for actuating the documentconveyor means to change original documents in response to the documentchange request signal output in the manual feed mode.

According to another aspect of the invention, a control system for acopying comprises, manual feed mode changeover means for switching to amanual paper feed mode which is one of the plurality of paper feedmodes, manual paper feed means for permitting copying papers to bemanually fed in the manual paper feed mode, document conveyor means fortransporting an original docuemnt to an exposure position anddischarging the original document from the exposure position, settingmeans for setting a number of copies to be taken from a single documentand for outputting a document change request signal when the number ofcopies set by the setting means have been taken in the manual feed mode,first control means for actuating the document conveyor means to changeoriginal documents in response to the document change request signaloutput, switch means disposed adjacent to the manual paper feed meansand adapted to output the document change request signal and secondcontrol means for actuating the document conveyor means to changeoriginal documents in response to the document change request signaloutput in the manual feed mode regardless of the number of copies set bythe setting means.

With the constructions described above, original documents areautomatically changed when a preset number of copies have been taken inthe manual feed mode. Furthermore, by pressing the switch disposedadjacent to the manual paper feed means, the copying operation may bestopped and the document conveyor means may be actuated to changeoriginal documents.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects and features of the present invention willbecome apparent from the following description taken in conjunction withthe preferred embodiments thereof with reference to the accompanyingdrawings. In the drawings:

FIG. 1 is a schematic sectional view of a copying machine to which thepresent invention may be applied,

FIG. 2 is a plan view of an operating panel,

FIG. 3 shows a circuitry employed in the copying machine,

FIG. 4 is a flow chart showing an outline of copying machine control,

FIGS. 5a, b, c and d are flowcharts showing details of a copyingsubroutine,

FIGS. 6a and b are flowcharts showing details of a counter controlsubroutine,

FIG. 7 is a flow chart showing an outline of ADF control,

FIG. 8 is a flow chart showing details of a document control subroutine,

FIG. 9 is a flow chart showing an outline of sorter control, and

FIG. 10 is a flow chart of sort mode control subroutine.

DETAILED DESCRIPTION OF THE INVENTION

An embodiment of the present invention will now be described withreference to the drawings.

FIG. 1 shows a copying machine including a manual paper feeding deviceand operable in association with a original document feeding device.First, an outline of the construction and operation of this copyingmachine will be described.

The copying machine 100 includes a photoreceptor drum 1 having aphotosensitive layer and mounted approximately at a central portion of amachine housing for rotation in the counterclockwise direction inFIG. 1. Around the photoreceptor drum 1, a main eraser lamp 2, asub-charger 3, a sub-eraser lamp 4, a main charger 5, a developingdevice 6, a transfer charger 7, a charger eraser 8, and a cleaningdevice 9 are sequentially disposed. The photoreceptor drum 1 is chargedand sensitized as it passes by the eraser lamps 2 and 4 and the chargers3 and 5, and receives an image exposure from a scanning optical system10 whereby an electrostatic latent image is formed on a surface of thedrum 1.

The optical system 10 is disposed below a document supporting glassplate 16 to scan a document image, and comprises a light source 17,movable mirrors 11, 12 and 13, a lens 14, and a fixed mirror 15. Thelight source 17 and the movable mirror 11 are driven to move leftward inthe drawing at a velocity v/n (wherein n represents magnification) withrespect to a peripheral velocity n of the drum 1 which is constantwhether real-size copying or variable magnification copying, occurswhereas the movable mirrors 12 and 13 are driven to move leftward in thedrawing at a velocity v/2n with respect to the peripheral velocity n ofthe drum 1.

Copying papers are fed into the machine 100 by an automatic paperfeeding device 20 or a manual paper feeding device 30 disposed at alefthand side of the machine housing. A copying paper fed into themachine 100 is brought to a halt by timing rollers 21 and is then fed toa transfer station in synchronism with the image formed on thephotoreceptor drum 1. In the transfer station the copying paper receivesthe toner image transferred by the transfer charger 7 and is separatedfrom the surface of the drum 1 by the action of the charge eraser 8.Thereafter the copying paper is transported by a conveyor belt 22 to afixing deivce 23 where the image is fixed to the paper, and finally to asorter 24.

After the image transfer, residual toner and electric charge are removedfrom the surface of the drum 1 by the cleaning device 9 and the eraser 2whereby the drum 1 is ready for a next copying cycle.

The automatic paper feeding device 20 and the manual paper feedingdevice 30 may be used selectively. The switching between the two devices20 and 30 is carried out, for example, by means of a sensor SE1 fordetecting opening and closing of a manual feeding table 31 which actsalso as a guide for manually fed copying papers. Alternatively, acopying paper fed through a manual feed inlet 32 when the machine isready to receive it may be detected by a sensor SE2 whereupon manualfeed rollers 33 are driven and a copying operation is started.

In the case of automatic paper feeding a print key 71 (FIG. 2) forstarting the copying operation is depressed to activate an image formingsystem including the photoreceptor drum 1 and the scanning opticalsystem 10. As the scanning optical system 10 is activated, a paper feedsignal is output to drive a paper feed roller 25 to feed a copying paperin synchronism with an image forming process.

In the case of manual paper feeding, on the other hand, when the sensorSE2 detects a copying paper inserted into the manual feed inlet 32, thepaper feed rollers 33 rotate to feed the paper into the copying machine.Simultaneously therewith or after a slight delay therefrom, thephotoreceptor drum 1 and the scanning optical system 10 are activated,as at the time of print key depression. The manually fed copying paperis temporarily stopped at conveyor rollers 35, which rotate upon outputof the paper feed signal to feed the paper further into the machine. Aswitch SW disposed adjacent to the paper feeding table 31 is a documentchanging switch for actuating an automatic document feeding device 200to change documents as described later. Preferably this switch SW isdisposed behind the manual feeding table 31 when the latter is closedinto the machine, so that the switch SW is operable by the user only attimes of manual copying paper feed.

The automatic document feeding device (hereinafter referred to as ADF)200 is detachably mounted on a top surface of the copying machine 100.When the ADF 200 is electrically connected to the copying machine 100and placed in position, controls for the ADF 200 and the copying machine100 are interrelated to each other and the operating mode of the copyingmachine 100 is switched to an ADF mode. The ADF mode is a mode forstarting the ADF 200 by operating the print key 71 provided on thecopying machine 100. When the print key 71 is operated in the ADF mode,document feed rollers 21 and a documet conveyor belt of the ADF 200 arestarted with the copying machine 100 in a standnby state. A documentplaced on a document ray 203 is transported along a top surface of thedocument supporting glass plate 16 and stops at a predetermined positionupon lapse of a predetermined time after a leading end thereof passes adocument sensor SE0. At this time a start signal is output from the ADF200 to the copying machine 100 to start the copying operation. Further,in the ADF mode, when the document has been scanned the copying machine100 transmits an activator signal to the ADF 200 whereupon the ADFdischarges the document onto a discharge tray 204. A next document onthe document tray 203, if any, is transported to its predeterminedposition simultaneously with the discharge of the preceding document.

In the case of copying by the manual feed mode, when the document changerequest switch SW is operated even before the last scanning of thedocument is completed, the document on the glass plate is discharged anda next document is set in position. The action of the ADf 200 is carriedout after the executing scanning is completed if the document changerequest switch SW is operated during the scanning, and is carried outimmediately if the document chnge request switch SW is operated outsidethe scanning time.

The sorter 24 is disposed at a copying paper discharge portion of thecopying machine 100. When the sorter 24 is electrically connected to thecopying machine 100, controls for the sorter 24 and the copying machine100 are interrelated. More particularly, when multicopying is effectedwith the sorter 24 in a sort mode, a deflecting device 241 movessuccessively downwardly from a position opposed to an uppermost bin 242ato discharge a copying paper into each bin 242. When a multicopying ofthe document is completed, the deflecting device 241 is returned to theposition opposed to the uppermost bin 242a and waits there until copyingof a next document is started.

FIG. 2 shows an operating panel of the copying machine 100, whichincludes the print key 71, a copy number indicator 72, copy numbersetting keys 80-89, an interrupt key 90, a clear-stop key 91, imagedensity setting keys 93 and 94, an image density indicator 95, andmagnifying keys 100-103. The copy number setting keys are operable toset a number of copies to be taken by multicopying in both the manualfeed mode and the automatic feed mode.

The copying machine 100 having the described construction is associatedwith a control system 300 including microcomputers, as shown in FIG. 3,to be controllable by a first CPU 301 and a second CPU 302. Furthermore,the control system 300 is associated with control systems (not shown)for the ADF 200 and the sorter 24 to carry out, by exchanging signalsamong themselves, collective and coordinated controls of the copyingmachine 100, the ADF 200 and the sorter 24.

The first CPU 301 is connected through a decoder 306 to a key matrixincluding the copy number setting keys or ten keys 80-89 and the printkey 71 arranged on the operating panel of the copying machine 100, thesensor or switch SE1 for detecting opening and closing of the manualfeeding table and the sensor or switch SE2 for detecting a manually fedcopying paper, to the indicator 72 for indicating a number of copiestaken which is determined by operating the ten keys 80-89, and to lightemitting diodes for varied indications. For the purpose of controllingthe copying machine operation, the first CPU 301 has output portsconnected to drive circuits (not shown) for a main motor, a developingmotor, clutches and chargers, and further having an interrupt signaloutput terminal INT and data input terminals Sin and Sout connected tothe second CPU 302 and control circuits (not shown) for the ADF 200 andthe sorter 24.

The second CPU 302 is adapted to control the optical system 10 of thecopying machine 100 and connected to a scan motor control circuit 307, amagnifying lens control circuit 308 and various detector switches (notshown) for the optical system.

The control sequence of the above control system or circuit 300 forcontrolling the copying machine 100, the ADF 200 and the sorter 24 in aninterrelated manner will be described hereinafter with reference to flowcharts shown in FIGS. 4 through 10.

FIG. 4 shows a flow chart in a summarized form of controls for thecopying machine 100. When a power is switched on, an initial setting isperformed at step 1. The initial setting means the processes toestablish variable operational settings for the copying machine 100 atstandard values such as setting the copy number indicator 71 to "1" andthe image density indicator 95 to a median density, and to clear RAM'sand resistors in the CPU's.

Step 2 is a copying subroutine for actuating the elements of the copyingmachine 100 to take copies. Details of step 2 are shown in FIG. 5.

Step 3 is a counter control subroutine for varying, storing andre-indicating the number of copies indicated by the indicator 71, inaccordance with operating modes of the copying machine 100. Details ofstep 3 are shown in FIG. 6.

At step 4 a decision is made as to elapse of a time period defined by aninternal timer which is provided to make a program processing time ofthe first CPU 301 to be constant regardless of the nature of processing.Each time the time period elapses, the control returns to the step 2 torepeat the above processing routines.

FIGS. 5a, b, c and d are flow charts showing details of the copyingsubroutine. At steps 201 to 209 the ADF 200 is actuated to place adocument in position on the glass plate when, in the manual copyingpaper feed utilizing the ADF 200, the manual feeding table 31 is openedand a first copying paper is manually fed.

At step 201 a decision is made as to whether or not the ADF is ready foruse. In the case of "YES", when the opening of the manual feeding table31 is detected at step 202, a manual feed start flag is set to "1" atstep 203. On the other hand, when the closing of the manual feedingtable 31 is detected at step 204, the manual feed start flag is set to"0" at step 205.

At step 206, a decision is made as to whether the manual feed start flagis set to "1" or "2". In the case that the flag is set to "1", when aleading end of the manually fed copying paper is detected at step 207,the flag is set to "0" at step 208 and an ADF start signal is set to "1"at step 209. In actual situations the ADF 200 is actuated by this ADFstart signal, as particularly described later, to place a first documentin position on the document supporting glass plate 16 for the manualcopying paper feed mode.

At steps 210 to 220, the copying machine 100 starts a copying takingoperation according to a copying paper feed mode and the ADF is actuatedto set or change the documents for a second and subsequent copying ofpapers in the manual feed mode started after the manual feeding table 31is opened or for the automatic copying paper feed mode.

At step 210 a decision is made as to whether the copying machine 100 isto operate in the manual feed mode or the automatic feed mode. In thecase of the automatic feed mode the step 211 follows, and in the case ofthe manual feed mode the step 218 follows. The mode setting process iscarried out at steps 310 to 316 to be described later.

At step 211 an ON-edge of the print key 71 is determined. When the ADF200 is detected to be in use at step 212, an ADF start signal foractuating the ADF 200 is output at step 213. On the other hand, when theADF 200 is detected to be out of use, a copy start flag for starting thecopying operation is set to "1" l at step 214.

After the print key 71 is accepted, the control sequence proceeds fromstep 211 to step 215.

When the ADF 200 is decided to be in use at step 215 and an ON-edge of adocument setting signal which is output upon placement of a document inposition by the ADF 200 is determined at step 216, the copy start flagis set to "1" at step 217.

In other words, when the print key 71 is depressed in the automaticcopying paper feed mode, the copying machine 100 starts the copyingoperation after the ADF 200 starts and places the document in positionif the ADF 200 is used, and starts the copying operation immediately ifthe ADF 200 is out of use.

At step 218 a decision is made as to whether a copying paper is manuallyfed or not in the manual feed mode by determining an on-edge state ofthe sensor SE2. When the copying paper is manually fed, a decision ismade as to whether or not a preset number of copies have been taken inthe manual feed mode at step 219. In the case of "NO", the copy startflag is set to "1" at step 220.

If the number of copies set for the manual feed mode is found to havebeen taken at step 219, the control sequence proceeds to steps 212 to214. Then, the ADF start signal is output if the ADF 200 is used, andthe copy start flag is set to "1" if the ADF 200 is out of use.

In other words, in the manual feed mode, the same document ismulticopied until a preset number of copies are taken without actuatingthe ADF 200. When the preset number of copies have been taken andthereafter a subsequent copying paper is fed manually, the ADF 200 isactuated to discharge the document that has been multicopied and totransport a next document onto the glass plate and place it in position.The the newly placed document is copied onto the copying papers fedmanually.

At steps 221 to 240 processings are carried out to actuate the variouselements of the copying machine 100. At step 221 a decision is made asto whether or not the copy start flag is set to "1". If the copy startflag is set to "1", the main motor, the developing motor, and thechargers including the transfer charger are energized, a copy flag isset to "1", the copy start flag is set to "0", and timers T-A and T-Bare set at step 222. Further, at step 223 the copying paper feed modefor the copying machine 100 is determined. In the case of the automaticfeed mode, the automatic feed roller clutch is energized at step 224. Inthe case of the manual feed mode, the manual feed roller clutch isenergized at step 225. Thus, copying paper feeding is started in eithermode. It is to be noted that in an actual situation actuating signalsfor the elements of the copying machine are output at step 240.

At steps 226 to 232, the copying paper fed into the machine is stoppedbefore the timing rollers 21 to wait for a timing signal output as aresult of movement of the optical system, and a leading end of thecopying paper and a leading end of an image are synchronized byactuating the timing rollers 21 in a timed relationship with the timingsignal output.

At steps 233 and 234, the chargers are turned off, a scan signal is setto "0" and the timing roller clutch is turned off to stop image formingupon lapse of a predetermined time after the timing signal output.

At steps 235 to 237, the developing motor and the transfer charger areturned off, the copy flag is set to "0" and a timer T-D is set when thescanning optical system 10 returns to a normal position.

At steps 238 and 239, the main motor is stopped after the timer T-Dcomes to an end.

At step 240, the signals output in the above routine are transmitted inone go to the elements of the copying machine.

FIG. 6 is a flow chart showing details of the counter controlsubroutine.

At steps 301 to 307, the copying paper feed modes are switched byopening and closing of the manual feeding table 31. When the on-edgestate of the sensor SE1 for deteting the opening of the manual feedingtable 31 is detected at step 301, the number of copies currentlyindicated by the indicator 72 is stored at step 302, the figure on theindicator 72 is changed to "0" at step 303, and the paper feed mode isswitched to the manual feed mode at step 304. On the other hand, whenthe closing of the manual feeding table is detected at step 305, thenumber of copies stored at the step 302 is indicated again by theindicator 72 at step 306 and the paper feed mode is switched to theautomatic feed mode at step 307.

At step 308, a decision is made as to whether or not the paper feed modeis the manual feed mode. In the case of the manual feed mode, countercontrol for the manual feed mode is effected at steps 309 to 323. In thecase of the automatic feed mode, counter control for the automatic feedmode is effected at step 324. Regarding the counter control for theautomatic feed mode, many variations have been proposed and practicedand, since such a counter control is outside the scope of the presentinvention, its detailed explanation is omitted from this specification.

At steps 309 to 312, a number input by means of the ten keys isindicated by the indicator 72 and at the same time stored as the numberof copies taken by the multicopying manual feed mode.

At steps 313 to 316, number "1" is indicated by the indicator 72 whenthe scanning optical system 10 finishes scanning the first document, andone is added to the number on the indicator 72 when each succeedingscanning is completed.

Steps 317 to 323 are steps taken when the document change request switchSW is operated.

At steps 317 and 318, a document change flag M is set to "1" when anON-edge of the document change request switch SW is detected.

At steps 319 to 323, when the document change flag M is set to "1" andthe scanning optical system 10 is not in the scanning action, the flag Mis set to "0", the ADF start signal is output, and the indication on theindicator 71 is changed to "0".

In other words, in the manual feed mode the number of copies to be takenmay be input by means of ten keys and, even when the input number ofcopies have not been taken, the multicopying of the document may beterminated and a next document may be placed on the document supportingglass plate by operating the document change request switch SW. Thisdocument change request switch SW is disposed at the manual feedingdevice 30 to be readily accessible during the manual feed modeoperation.

FIG. 7 shows a flow chart in a summarized form of the controls for theADF 200. At step A1 a CPU (not shown) for controlling the ADF 200 isinitialized. Step A2 is a document control subroutine for transporting adocument from the document tray 203 to the predetermined position on thedocument supporting glass plate and, after copying, discharging thedocument onto the document discharge tray 204. Details of thissubroutine will be described with reference to FIG. 8. At step A3 adecision is made as to termination of a timer for making a routineprocessing time constant.

Referring to FIG. 8 showing the details of the document controlsubroutine, the document feed rollers 201 and the document conveyor belt202 are driven at steps A201 and A202 when the ADF start signal isdetected. The ADF start signal is output at step 204 when the print key71 is depressed, when the first copying paper is manually fed in themanual feed mode, and when multicopying is completed, and at step 322when the document change request switch SW is pushed in the manual feedmode.

At steps A203 to A207, the document feed rollers 201 and the documentconveyor belt 202 are stopped to place the document in the predeterminedposition and to output the document setting signal upon lapse of apredetermined time after the document detecting sensor SE0 detects aleading end of the document fed in. The copying operation is started bydetecting the document setting signal at the step 216.

At steps A208 to A 212, when final scanning of the document placed inposition on the document supporting glass 16 is completed, the documentconveyor belt 202 is driven for a predetermined time to discharge thecopied document onto the discharge tray 204.

FIG. 9 is a flow chart in a summarized form of the controls for thesorter 24. At step S1, a CPU (not shown) for controlling the sorter 24is initialized and the deflecting device 241 is set to the positionopposed to the uppermost bin 242a. Step S2 is a sort mode controlsubroutine for causing the copying papers discharged from the copyingmachine 100 to be received by the sorter 24 in the sort mode. Details ofthis subroutine are described with reference to FIG. 10. Step S3 is forcontrolling other modes than the sort mode, such as a stack mode, agrouping mode, etc. At step S4 a decision is made as to termination of atimer for making a routine processing time constant.

FIG. 10 is a flow chart showing the details of the sort mode controlsubroutine. The sort mode is a mode for placing copying paperscontinuously discharged from the machine in multicopying one in each bin242.

At steps S201 and S202, bin numbers are incremented in a timedrelationship with the discharge of the copying papers from the copyingmachine 100. More particularly, when the deflecting device 241 is in aposition opposed to a bin numbered "1", the bin number "1" is changed to"2" timed with the discharge of a copying paper from the copying machine100. And after the copying paper is discharged to that bin, thedeflecting device 241 is moved to a position opposed to a bin with theincremented number "2".

At step S203, a decision is made as to whether or not the ADF startsignal is "1". If it is "1", step S205 follows and the bin number is setto "1". If it is "0", step 204 follows. The ADF start signal becomes "1"when the document change request switch SW is pushed in the manual feedmode utilizing the ADF 200 or when multicopying utilizing the ADF 200 iscompleted.

At step S204 a decision is made as to whether or not the number ofcopying papers preset by means of the ten keys have been discharged. Inthe case of "YES" the control sequence proceeds to step S205 and the binnumber is set to "1". If the preset number of copying papers have notbeen discharged, the control sequence proceeds to step S206 at which adecision is made whether or not the bin number is greater by one than amaximum number of bins. When the bin number does not exceed the maximumnumber of bins, the control sequence makes a return. When the bin numberis greater by one than the maximum number of bins, the control sequenceproceeds to step S205.

Thus, in the above mode, the preset number of copying paperscontinuously discharged are placed in the uppermost bin 242a and nextbins below successively by moving the deflecting device 241, and thedeflecting device 241 is returned to the position opposed to theuppermost bin 242a when the preset number of copying papers are placedin the bins. When the preset number of copying papers is greater thanthe number of bins in the sorter 24, the uppermost bin 242a and the binssuccessively below receive the copying papers all over again after alowermost bin 242b has received one and this is repeated until thepreset number of papers are all placed in the sorter. When the presetnumber of copying papers have been placed in the sorter, the deflectingdevice 241 is returned to the position opposed to the uppermost bin242a.

The control as above is performable when multicopying is set by means ofthe ten keys whether the manual feed mode or the automatic feed mode.Furthermore, when the document change request switch SW is pushed in themanual feed mode utilizing the ADF 200, the deflecting device 241 of thesorter 242 is returned to the position opposed to the uppermost bin 242ato be ready to carry out the copying paper sorting for a next document.

For multicopying a plurality of documents in the manual copying paperfeed mode with the described embodiment, the manual feeding table 31 isopened to set the copying machine 100 to the manual feed mode, thedocuments are set on the document tray 203 of the ADF 200, and thenumber of copies to be taken is registered by means of the ten keys onthe operating panel. When a first copying paper is fed in the manualfeed mode, the ADF 200 is actuated to place a document in position onthe document supporting glass plate whereupon the manual feed modecopying operation is started. For a second copying paper to the last inthe number of copying papers preset by means of the ten keys, thecopying is carried out without actuating the ADF 200.

When the number of copies preset by means of the ten keys have beentaken, the ADF 200 is actuated to change the documents whereuponmulticopying in the manual feed mode for the new document is ready totake place.

When replacement of the document being copied is desired during themulticopying in the manual feed mode with the preset number of copiesuncompleted, the multicopying in the manual feed mode may be interruptedand the ADF 200 is actuated to change the documents by pushing thedocument change request switch SW.

Furthermore, the copying papers in the manual feed multicopying aresortable by the sort mode utilizing the sorter 24.

Still further, by pushing the document change request switch SW duringthe manual feed multicopying utilizing the ADF 200 with the sorter 24operating in the sort mode, the documents may be changed and thedeflecting device 241 of the sorter 24 may be returned to the positionopposed to the uppermost bin 242a to be ready to carry out the copyingpaper sorting for the next document.

As will be clearly understood from the foregoing description, thecontrol system for the copying machine according to the presentinvention facilitates setting of documents to the exposure position forthe manual feed copying. Moreover, the operator is completely freed fromthe trouble of changing the documents by the arrangement that the numberof copies to be taken in the manual feed multicopying is registered bymeans of the ten keys and the document conveying device is automaticallyactuated when the preset number of copies have been taken. The provisionof the document change request switch permits the manual feedmulticopying to be stopped at any time for document changing, whichpromotes flexibility of multicopying.

Although the present invention has been fully described by way ofexample with reference to the accompanying drawings, it is to be notedthat various changes and modifications will be apparent to those skilledin the art. Therefore, unless otherwise such changes and modificationsdepart from the scope of the present invention, they should be construedas included therein.

What is claimed is:
 1. A control system for a copying machine operablein a plurality of paper feed modes, comprising:manual feed modechangeover means for switching to a manual paper feed mode which is oneof the plurality of paper feed modes; manual paper feed means forfeeding copying papers; document conveyor means for transporting anoriginal document to an exposure position and discharging the originaldocument from the exposure position; switch means disposed adjacent tothe manual paper feed means and adapted to output a document changerequest signal; and control means for actuating the document conveyormeans to change original documents in response to the document changerequest signal output in the manual feed mode.
 2. A control system asclaimed in claim 1 wherein said control means actuates the documentconveyor means after completion of exposure of the document when thedocument change request signal is output during the exposure.
 3. Acontrol system as claimed in claim 1 wherein the manual paper feed meansincludes a manual feeding table movable between an operative positionfor permitting manual paper feeding and a contained inoperativeposition, the document change request switch being disposed in aposition accessible when the manual feeding table is in the operativeposition and inaccessible when the manual feeding table is in theinoperative position.
 4. A control system as claimed in claim 3 whereinthe manual feeding table is adapted to open and close, the switch beinginaccessible when the table is closed.
 5. A control system as claimed inclaim 4 wherein the manual feed mode changeover means includes sensormeans for detecting the opening and closing of the manual feeding table.6. A control system as claimed in claim 4 wherein the manual feed modechangeover means includes sensor means for detecting a copying papermanually inserted into the manual paper feed means.
 7. A control systemfor a copying machine operable in a plurality of paper feed modes,comprising:manual feed mode changeover means for switching to a manualpaper feed mode which is one of the plurality of paper feed modes;manual paper feed means for feeding copying papers manually insertedinto a manual feed inlet; document conveyor menas for transporting anoriginal document to an exposure position and discharging the originaldocument from the exposure position; switch means disposed adjacent tothe manual paper feed means and adapted to output a document changerequest signal; sorter means including a plurality of bins and adaptedto sort image-carrying copying papers by placing the copying papers inan uppermost bin first and then next bins therebelow successively; andcontrol means for actuating the document conveyor means to changeoriginal documents in response to the document change request signaloutput in the manual feed mode, and for returning the sorter means to aninitial mode to place the image-carrying copying papers in the uppermostbin and next bins therebelow successively.
 8. A control system asclaimed in claim 7 wherein said control means actuates the documentconveyor means after completion of exposure of the document when thedocument change request signal is output during the exposure.
 9. Acontrol system for a copying machine operable in a plurality of paperfeed modes, comprising:manual feed mode changeover means for switchingto a manual paper feed mode which is one of the plurality of paper feedmodes; manual paper feed means for feeding copying papers manuallyinserted into a manual feed inlet; document conveyor means fortransporting an original document to an exposure position anddischarging the original document from the exposure position; settingmeans for setting a number of copies to be taken from a single documentand for outputting a document change request signal when the number ofcopies set by the setting means have been taken in the manual feed mode;first control means for actuating the document conveyor means to changeoriginal documents in response to the document change request signaloutput; switch means disposed adjacent to the manual paper feed meansand adapted to output the document change request signal; and secondcontrol means for actuating the document conveyor means to changeoriginal documents in response to the document change request signaloutput in the manual feed mode regardless of the number of copies set bythe setting means.
 10. A control system as claimed in claim 9 whereinthe second control means actuates the document conveyor means aftercompletion of exposure of the document when the document change requestsignal is output during the exposure.
 11. A control system as claimed inclaim 10 further comprising sorter means including a plurality of binsand adapted to sort image-carrying copying papers by placing the copyingpapers in an uppermost bin first and the next bins therebelowsuccessively, the control means being operable, in response to thedocument change request signal output in the manual feed mode, toactuate the document conveyor means to change documents and to returnthe sorter means to an initial mode to place the image-carrying copyingpapers in the uppermost bin and next bins therebelow successively. 12.The invention of claim 9 wherein the manual paper feed means includes afeed table that is movably mounted on the copying machine and the switchmeans includes a sensor switch that is responsive to the position of thefeed table.